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OSHA TRIR & DART Calculator: Recordable Incident Rate

Calculate TRIR, DART and days-away rates from your OSHA Form 300A totals and hours worked. Compare with the BLS national rate.

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Case totals from your OSHA Form 300A (for the year)

Leave a box empty for zero. Only recordable cases count: first-aid-only cases are not on the form.

Hours worked by all employees

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What the OSHA incident rates measure

TRIR, the DART rate and the days-away rate turn a count of injuries into a rate you can compare. Each one is cases multiplied by 200,000 and divided by the hours worked by all employees. The 200,000 is the hours that 100 full-time workers put in over a year (40 hours × 50 weeks × 100), so the result reads as cases per 100 full-time workers, whatever the size of the company.

The three rates, from OSHA Form 300A

  • TRIR (total recordable incident rate): every recordable case, columns G, H, I and J: deaths, days away from work, job transfer or restriction, and other recordable cases.
  • DART rate (days away, restricted or transferred): the cases in columns H and I only. It leaves out deaths and the recordable cases that needed no time off or job change, so it tracks the more serious injuries.
  • Days-away rate: column H alone, the cases where the worker lost at least a day.

Worked example

A company with 250 employees working 48 hours a week for 50 weeks logs 600,000 hours. Its Form 300A shows 2 cases with days away from work, 3 with job transfer or restriction and 4 other recordable cases: 9 recordable cases in total. TRIR is 9 × 200,000 ÷ 600,000 = 3.00. The DART rate, with 5 cases, is 1.67, and the days-away rate, with 2 cases, is 0.67.

Comparing with the national figure

The Bureau of Labor Statistics reported 2.3 total recordable cases per 100 full-time workers for all US private industry in 2024, with a DART rate of about 1.4 and a days-away rate of about 0.9 for 2023-24. In the example above a TRIR of 3.00 is 1.30 times the national rate. The national figure mixes every industry; the fair comparison is the rate for your own industry code in the BLS injury and illness tables, and your own results over time. With few hours worked, a single case moves the rate a lot.

Where the inputs come from

Take the case totals from the year's OSHA Form 300A. For hours, use payroll or timekeeping records for all employees, including part-time and seasonal staff. This tool calculates and does not file anything: it is for your own tracking, safety reports and contractor questionnaires. For rates on a million-hour base, as used in Australia and the UK, use the TRIFR calculator or the LTIFR calculator.

Frequently asked questions

What is TRIR and how is it calculated?
TRIR (Total Recordable Incident Rate) is the number of OSHA-recordable injuries and illnesses per 100 full-time workers in a year. The formula is TRIR = (recordable cases × 200,000) ÷ hours worked by all employees, where 200,000 is the hours 100 full-time workers put in over a year (40 hours × 50 weeks × 100). Example: 250 employees working 48 hours a week for 50 weeks log 600,000 hours. With 9 recordable cases (2 with days away from work, 3 with job transfer or restriction, 4 other recordable) the TRIR is 9 × 200,000 ÷ 600,000 = 3.00.
What is the difference between TRIR and the DART rate?
TRIR counts every recordable case: deaths, days away from work, job transfer or restriction, and other recordable cases (columns G, H, I and J of OSHA Form 300A). The DART rate counts only the cases with days away, restricted duty or job transfer (columns H and I), so it measures the more serious end. In the same example (600,000 hours) the 5 DART cases give a DART rate of 5 × 200,000 ÷ 600,000 = 1.67, against a TRIR of 3.00. The days-away rate uses column H alone: 2 cases give 0.67.
Where do I find the numbers to enter?
The case counts are the totals on your OSHA Form 300A (Summary of Work-Related Injuries and Illnesses) for the year: column G for deaths, H for cases with days away from work, I for cases with job transfer or restriction, J for other recordable cases. The hours are the total hours worked by all employees, which you can take from payroll or timekeeping records. If you do not keep hours, use the estimate option and check OSHA's recordkeeping instructions for how estimates are allowed.
Is my TRIR good? What is the national average?
The Bureau of Labor Statistics reported 2.3 total recordable cases per 100 full-time workers for all US private industry in 2024 (news release of 22 January 2026), with a DART rate of about 1.4 and a days-away rate of about 0.9 for 2023-24. A rate of 3.00 is 1.30 times the 2.3 national figure. Rates differ widely by industry and size, so the fair comparison is with your own industry code in the BLS tables, and with your own earlier years. With few hours worked, one case moves the rate a lot.
Why is the base 200,000 hours?
It stands for 100 full-time employees working 40 hours a week for 50 weeks, so the result reads as cases per 100 full-time workers regardless of company size. That is what lets a 20-person shop and a 2,000-person plant be compared. BLS publishes the same rates per 10,000 workers using a base of 20,000,000 hours; divide those by 100 to get the per-100 figure used here.
What is the difference between TRIR and TRIFR?
They are the same idea on different bases. TRIR is per 200,000 hours, the US OSHA convention. TRIFR (Total Recordable Injury Frequency Rate) is usually per 1,000,000 hours, the convention in Australia and the UK, and its definition of a recordable case can differ. If you report in a million-hour base, use the TRIFR calculator on this site.

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